| Summary: | Sediment cores from lake Uusa from Estonia were eхamined to establish correlations between changes in lake conditions and catchment evolution since the postglacial period. Coring and sampling of the selected sites according to common methodology with the following application of the lithological, isotope (δ18O, δ13C), pollen, radiocarbon (14C), investigations. Common patterns in lake sedimentation and fluctuations, mainly due to the general tendency of climate warming at the beginning of the postglacial epoch and disappearance of permafrost, which led to the increase in infiltrating processes. Lake sedimentation began in territory of the modern catchment area, instead of in a lake hollow as glaciokarst most intensively proceeded on raised sites
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